粉红色鼻或严重色素缺乏为缺陷。

Pink nose or one seriously lacking in pigmentation to be faulted.

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眼皮肤白化病是一组与黑色素生物合成有关的遗传性疾病，表现为眼、皮肤、毛发黑色素缺乏等。

Oculocutaneous albinism in eye skin is a series of hereditary disease related to melanin biosynthesis, which is mainly short of melanin of eye, skin, hair and brings various hazard to patients.

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而其他羽毛化石(尽管缺乏碳元素)中找到的痕迹，也许能显示已经因氧化而消失的黑色素体的原始存在。

But trace imprints found in other fossilised feathers (despite an absence of carbon) may indicate the original presence of melanosomes that have since been lost to oxidation.

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